Effect of a new upsetting process with large height-to-diameter ratio on the microstructure of Mg-Gd-Y-Zn-Zr alloy

被引：3
作者：
Ye, Yugang [1 ]
Liu, Chao [2 ]
Xue, Yong [2 ]
机构：
[1] ShanXi Inst Technol, Dept Mech Engn, Yangquan 045000, Peoples R China
[2] North Univ China, Sch Mat Sci & Engn, Taiyuan 030051, Peoples R China
来源：
MATERIALS LETTERS | 2023年 / 339卷
基金：
中国国家自然科学基金;
关键词：
Mg-Gd-Y-Zn-Zr; Severe plastic deformation; Upsetting; Dynamic recrystallization;
D O I：
10.1016/j.matlet.2023.134047
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, a new upsetting process with large height-to-diameter ratio is proposed, which breaks the limitation of the traditional upsetting process on the height-to-diameter ratio of the billet. The Mg-9.5Gd-4Y-2.2Zn-0.5Zr (wt.%) alloy bar with a height-to-diameter ratio of 6.5 was successfully upset and its microstructure evolution was investigated. The alloy underwent dynamic recrystallization (DRX) during upsetting, and the microstructure refinement was obvious, with the highest recrystallization ratio of 46.3 % in the center of the billet and the average grain size of 20.2 mu m. The basal texture was roughly parallel to the metal flow lines in each region, and weakened as the recrystallization rate increases.
引用
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页数：4
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